Machines



(No Model.)

M. T. REEVES.

OONGAVE FOR O'LOVEB. HULLING MACHINES.

No. 499,591. Patented June 13, 1893.

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UNITED STATES PATENT UFFICE.

MARSHAL T. REEVES, OF COLUMBUS, INDIANA, ASSIGNOR TO REEVES & CO. OF SAME PLACE.

CONCAVE FOR CLOVER-HULLING MACHINES.

SPECIFICATION forming part of Letters Patent No. 499,591, dated June 13, 1893.

Application filed January 23, 1893- Serial No. 459,409. (No model.)

'1'0 all whom it may concern: contiguous staves. The spaces between said Be it known that I, MARSHAL T. REEVES, ribs form channels to receive wooden bars, F, a citizen of the United States, residing at F, which are secured in position by means of lumbus, in the county of Bartholomew and the shanks of the hulling-teeth, as herein- 5 State of Indiana, have invented a new and after explained, and which form a strong and useful Concave for Clover-Hulling Machines, slightly elastic backing for the casting. of which the following isa specification. Stave A is pierced at intervals with two My invention relates to an improved manseries of rectangular perforations, as at G, ner of constructing the working surface of and the Wooden strips F are also correspond- 6o [0 the hulling concave of a clover-hulling ma-- ingly perforated. Twoseries ofhulling-teeth,

chine. II, and, I, are mounted in each stave, each The object of my improvement is to form, tooth being provided with a screw-threaded on each side of the base of each of the hullshank, J,which passes through the openingG ing-teeth, a roughened surface which shall and through the wooden bar F and is se- [5 project above the general Working surface of cured therein by a nut, K. The sides of each the concave, forming a continuation of the tooth are provided with a series of corrugaoutline of the tooth and also supports for the tions, L, and the top edge of the tooth is sides of the tooth which shall prevent the rounded as atM. The base ofthetooth is made tooth from turning in the concave, and also slightly thicker than the main portion, and 2o breaking up the continuity of the working theoutline of the thicker portion is that of a surface, so that, as the clover head passes circle concentric with but of larger radius from one seriesof teeth to anotherin the conthan the outline of the upper edge of the cave, it is partially relieved from pressure, tooth. The edges of the base of the tooth are thus permitting it to shift position and pretapered inward as at N. Arranged on each 25 sent a new surface to the rubbing action of side of the opening in the stave through the teeth of the concave, all as hereinafter which the shank of the tooth passes, is a fully set forth. pair of ribs, 0, 0, formed integral with the The accompanying drawings fully illustrate stave, raised above the general surface of the my invention. concave, and having an open space, R, be- 30 Figure 1 represents a plan of a portion of tween them correspondingin width and shape one of the staves from which the hulling-cylto the base of the tooth. The upper surfaces inder is formed. Fig. 2 represents a transof said ribs are of a curved outline correverse section of the same at a Fig. 1. sponding to and forming a continuation of Fig. 3 represents a longitudinal section at the upper curved surface of the base of the 5 --b Fig. 1. tooth. Said upper surfaces of the ribs are The general construction of my concave is also corrugated, the corrugations registering of the usual well known form, consisting of a with and forming contiuuations of the corruseriesIof segmental staves secured together at gations L in the teeth. These ribs thus form, the ends to form a hollow cylinder in which practically, a part of the rubbing tooth, but, o 0 the hulling-cylinder revolves, and having inbeing formed integral with the surface of the wardly projecting rubbing-teeth secured in concave and projecting above it on each side each stave or section. of the base of the tooth, form a long narrow Inthe drawings, A, indicates the segmental seat for the tooth which prevents it from stave, which is formed preferably of malleturning in the concave. 5 able cast-iron and is provided on its inner In the operation of hulling, the teeth of the or concave surface with several series of ophulling-cylinder being of the same outline as positelyinclined roughened surfaces, B,and O. the teeth in the concave, and there being a Stave A is provided on its outer or convex narrow space between the teeth of the cylinsurface with a series of radial longitudinal der and the teeth of the concave, the clover I00 50 ribs, D, one of which is provided with a lip, heads are rubbed between the sides of the E, so as to overlap the joint formed by two opposed teeth of the cylinder and the concave and also between the ends of the cylinder-teeth and the surfaces of the ribs 0. The ribs 0 being raised above the general surface of the concave and there being an open-space, P, between the ends of the two series of ribs in the concave, the clover head is partially relieved from pressure while passing said space, and, being engaged by the diagonal corrugations of the general surface of the concave, is turned so as to present a new surface to the next series of hulling-teeth.

I claim as my invention- 1. In a clover-huller-concave, the combination with a hulling-tooth having a shank which extends through the body of the concave, of a pair of ribs formed integral with the body of the concave, projecting above its general surface, and having a space between them adapted to receive the base of the tooth, said ribs forming a continuation of the outline of the sides of the tooth substantially as set forth.

2. In a clover-huller-concave, the combination with a hulling-tooth having corrugated sides and a shank extending through the body of the concave, of a pair of ribs formed integral with the body of the concave, projecting above its general surface, and having a space between them adapted to receive the base of the tooth, said ribs forming a continuation of the outline of the sides of the tooth substantially as set forth and having corrugations which register with and form forming continuations of the corrugations in the teeth, all substantially as set forth.

4. A stave for forming hulling-concaves for clover-h ulling-machines, consisting of alight metallic segmental casting having on its concave surface a series of oppositely arranged diagonal corrugations, and a series of raised ribs arranged in pairs and adapted to receive and support a hulling tooth between them, and having upon its convex surface a series of radial longitudinal ribs forming longitudinal channels, and wooden strips secured in said channels and forming an elastic backing for said casting as set forth.

MARSHAL T. REEVES.

Witnesses:

J. N. D. REEVES, ED. COLEMAN, Jr. 

